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Measuring magnetic fields with single axis gaussmeters

Magnetic Shield Corporation has chosen to offer single axis A.C. gaussmeters to customers who wish to measure magnetic field strength and direction.

Single axis meters (a single internal coil) were chosen because of two advantages. First and perhaps more importantly in many situations, they tell the user what direction the field is coming from. (In order to do this, however, the field and the meter must be properly oriented.)

Secondly, they are significantly more affordable than the multiple axis meters available.

The figure above shows the proper orientation between the meter and field. This occurs when the field passes perpendicular through the meter's internal coil.

In this position you can determine the overall magnitude of the field and from what direction it is coming.

You can also use a single axis meter to break a field down into its orthogonal (right angle) components. To measure a magnetic field coming through a wall, face the wall and read the "x" component of the field. Then turn 90° to the wall and record the "y" field. Finally, turn the meter vertical to read the "z" field. To get the total strength take the square root of the sum of the squares of the three directions.